fix poor t/op/runlevel.t test

fix poor t/op/runlevel.t test

This patch fixes the Can't "goto" outside block test. Before, the
test only hit the desired error if the system sort did a compare
where $a was 0, which is not guaranteed (and does not occur on at
least one system.) Now both arguments are tested.

Credited: Hugo van der Sanden <hv@crypt.compulink.co.uk>
Credited: Gurusamy Sarathy <gsar@engin.umich.edu>

p5p-msgid: 199709261458.KAA28611@dolores.harvard.edu